hypabyssal

hypabyssal

[hip-uh-bis-uhl, hahy-puh-]
adjective Geology.
1.
(of an igneous rock) intermediate in texture between coarse-grained intrusive rocks and fine-grained extrusive rocks.
2.
noting any of various minor intrusions, as dikes and sills, that have crystallized under conditions intermediate between plutonic and extrusive.

Origin:
1890–95; hyp- + abyssal

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World English Dictionary
hypabyssal (ˌhɪpəˈbɪsəl)
 
adj
(of igneous rocks) derived from magma that has solidified at shallow depth in the form of dykes, sills, etc
 
[C19: from hyp- + -abyssal]

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